@article{00697114, title = {Nonresonance conditions for fourth order nonlinear boundary value problems.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {17}, year = {1994}, pages = {725-740}, doi = {10.1155/S0161171294001031}, zbl = {0810.34017}, language = {en}, url = {http://dml.mathdoc.fr/item/00697114} }
de Coster, C.; Fabry, C.; Munyamarere, F. Nonresonance conditions for fourth order nonlinear boundary value problems.. International Journal of Mathematics and Mathematical Sciences, Tome 17 (1994) pp. 725-740. doi : 10.1155/S0161171294001031. http://gdmltest.u-ga.fr/item/00697114/